Which rental car companies rent hybrids?

I work for Enterprise and I have seen the Prius in our fleet, along with the Altima hybrid, the Civic hybrid, the Kia Optima hybrid, and the Ford Escape hybrid. National and Alamo are owned by Enterprise, so they may also have hybrids in their fleets.

The Nissan Leaf is being tried at some airport locations, but I don't know how well that is working for them or what it costs.